英汉词典

1. 不需要的；没必要的；多余的
    If you describe something as unnecessary, you mean that it is not needed or does not have to be done, and is undesirable.

unnecessary在线翻译

    e.g. The slaughter of whales is unnecessary and inhuman...
           屠杀鲸鱼是没有必要的也是不人道的。
    e.g. He accused Diana of making an unnecessary fuss.
           他责备黛安娜没必要那么大惊小怪。